Work around broken cryptography in Fedora 41.

changelogs/fragments/834-crypto_info-fedora-41.yml

@@ -0,0 +1,5 @@
+bugfixes:
+  - "crypto_info - when running the module on Fedora 41 with ``cryptography`` installed from the package repository,
+     the module crashed apparently due to some elliptic curves being removed from libssl against which cryptography
+     is running, which cryptography did not expect
+     (https://github.com/ansible-collections/community.crypto/pull/834)."

plugins/modules/crypto_info.py

@@ -177,8 +177,16 @@
 try:
     import cryptography
     from cryptography.exceptions import UnsupportedAlgorithm
+
+    try:
+        # While UnsupportedAlgorithm got added in cryptography 0.1, InternalError
+        # only got added in 0.2, so let's guard the import
+        from cryptography.exceptions import InternalError as CryptographyInternalError
+    except ImportError:
+        CryptographyInternalError = Exception
 except ImportError:
     UnsupportedAlgorithm = Exception
+    CryptographyInternalError = Exception
     CRYPTOGRAPHY_VERSION = None
     CRYPTOGRAPHY_IMP_ERR = traceback.format_exc()
 else:
@@ -274,6 +282,11 @@ def add_crypto_information(module):
                     curves.append(curve_name)
                 except UnsupportedAlgorithm:
                     pass
+                except CryptographyInternalError:  # pylint: disable=duplicate-except,bad-except-order
+                    # On Fedora 41, some curves result in InternalError. This is probably because
+                    # Fedora's cryptography is linked against the system libssl, which has the
+                    # curves removed.
+                    pass
 
     info = {
         'version': CRYPTOGRAPHY_VERSION,